Patent US2591933A successfully refreshed from Google Patents.
US2591933A
Expired / Lapsed
US
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Steam engine having a unitary valve actuator
Assignee: YUBA Manufacturing Co
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Filing: 1948-10-04
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Granted: 1952-04-08
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Expires: 1968-10-04
Abstract
No abstract record available.
Inventors
- 👤 Robert L Harris
- 👤 Lothrop Marcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:15
CPC Classifications
F; F01; F01B; F01B29/00; F01B29/04; F01B1/00; F01B1/06; F01B1/062; F01B1/0624; F01B1/0634; F01B1/0637; F01B1/0641; F01B1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US863545A
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US995384A
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US1478843A
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US1293562A
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US2009745A
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US2102389A
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US2051534A
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US2413751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |